These Bi-Di Single-Mode Fiber SFP's connectors are specifically designed to work with our switches. They feature a 1Gb connection to efficiently move large amounts of data over long distances. This kit comprises of 1 Transceiver and 1 Receiver and it is directional so please make sure you connect 1 on one side and the opposite on the other. The interface type requires an LC connector. Their maximum transmission distance is 20km and utilizes 1310nm & 1550nm wavelengths.